US 11,853,496 B2
Using electrical resistance to estimate force on an electrode during temperature changes
Tom Vandermeijden, San Jose, CA (US)
Assigned to Synaptics Incorporated, San Jose, CA (US)
Filed by Synaptics Incorporated, San Jose, CA (US)
Filed on Oct. 21, 2022, as Appl. No. 17/971,532.
Application 17/971,532 is a division of application No. 17/235,190, filed on Apr. 20, 2021, granted, now 11,494,023.
Application 17/235,190 is a continuation of application No. 16/395,508, filed on Apr. 26, 2019, granted, now 11,009,988, issued on May 18, 2021.
Claims priority of provisional application 62/667,418, filed on May 4, 2018.
Prior Publication US 2023/0045039 A1, Feb. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G01R 27/14 (2006.01); G06F 3/045 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04146 (2019.05) [G01R 27/14 (2013.01); G06F 3/045 (2013.01); G06F 3/0412 (2013.01); G06F 3/0414 (2013.01); G06F 3/0443 (2019.05); G06F 3/0446 (2019.05); G06F 3/04144 (2019.05)] 20 Claims
OG exemplary drawing
 
1. A processing system, comprising:
sensor circuitry configured to, using a plurality of sensor electrodes:
obtain a plurality of capacitive measurements of a sensing region; and
obtain a resistance measurement of the sensing region; and
processing circuitry coupled to the sensor circuitry, wherein the processing circuitry is configured to:
determine a location of an input object using the plurality of capacitive measurements of the sensing region, wherein the location is a virtual button,
acquire the resistance measurement using a subset of the plurality of sensor electrodes in a region that excludes the virtual button,
determine a force value based on the resistance measurement and the location of the input object, wherein determining the force value mitigates a temperature variation of the sensing region affecting the resistance measurement, and
report the force value.